Ground 2: The sentence was in breach of the principle of parity
37The appellant complains that, despite his Honour's clear finding that ES was the principal in the importation (in which the appellant was involved as a supplier of the drug imported), and that the appellant was, in all respects, subordinate to ES, acting at his instruction and direction in his dealings with the container and its contents, a difference of 7 months between the appellant's sentence of 15 years 11 months and 1 week and ES's undiscounted sentence of 16 years and 6 months, when viewed objectively, gives rise to a justifiable sense of grievance.
38The principle of parity derives from the fundamental norm of equal justice. In Green v The Queen; Quinn v The Queen [2011] HCA 49; (2011) 244 CLR 462, at [28] per French CJ, Crennan and Kiefel JJ, their Honours said of equal justice:
"It requires, so far as the law permits, that like cases be treated alike. Equal justice according to law also requires, where the law permits, differential treatment of persons according to differences between them relevant to the scope, purpose and subject matter of the law. As Gaudron, Gummow and Hayne JJ said in Wong v The Queen:
'Equal justice requires identity of outcome in cases that are relevantly identical. It requires different outcomes in cases that are different in some relevant respect.'"
(References omitted).
39The sense of grievance complained of when the sentence for one offender is compared relative to that of a co-offender or co-offenders, is to be assessed objectively governed by considerations of substance rather than form. It is only triggered where differences in the sentences imposed on co-offenders is disproportionate to relevant distinctions in the role each played in the commission of the offence (even if the roles might be differently described or involve different conduct) and in an offender's subjective circumstances. There are necessarily degrees of both similarity and difference in the criminal conduct of co-offenders and in their subjective circumstances. In some cases this requires that different sentences be imposed. However, it is only where the discrepancy between sentences is not reasonably explained by the degree of difference between co-offenders and their offending that the disparity is such that appellate intervention is required. For there to be a justifiable sense of grievance, the disparity must be "gross", "marked" or "glaring" (see the discussion by Howie J in Crystal Lee England v R [2009] NSWCCA 274 at [61]-[67]).
40In Gill v R [2010] NSWCCA 236 at [58], McColl JA (with whom RS Hulme and Latham JJ agreed) observed that an applicant faces considerable obstacles in invoking the parity principle in circumstances where a sentence, said to give rise to a justifiable sense of grievance, was imposed by a sentencing judge who was aware of the sentences imposed on co-offenders and it is clear that the sentence is structured in that knowledge.
41In considering this appellant's complaint, that his sentence cannot be maintained given ES's senior role, there is the additional practical difficulty, recognised by the High Court in Green v The Queen; Quinn v The Queen supra at [30], in comparing sentences imposed on participants in the same criminal enterprise who have been charged with different offences with different maximum penalties.
42The High Court also recognised that the greater the difference between the offences, the greater the practical difficulties in ensuring that sentences reflect the principle of equal justice, particularly where disparity is said to arise from a sentence imposed on a co-offender who has been sentenced for an offence that is less serious. If the difficulty identified by the High Court is to have any currency on this appeal, it is complicated by the fact that, although ES was sentenced against a maximum of 25 years imprisonment, while this appellant (and Lachlan Wilson) were sentenced against a statutory maximum of life imprisonment, ES's offending was, clearly, objectively more serious than this appellant's offending. In the appellant's case, there is the further legislative guidepost to an appropriate sentence that operates by reason of the standard non-parole period of 15 years while no standard non-parole period applies to the importation charge against ES, it being a Commonwealth offence.
43While, for those reasons, it is not possible to make a direct comparison between the sentence imposed on this appellant and that imposed upon ES and Lachlan Wilson, a meaningful comparison is possible. That task was undertaken by the sentencing judge, both in reflecting on the sentences imposed on Lachlan Wilson previously and on ES the previous day. His Honour made express reference to what he referred to as "equal justice considerations" and the hierarchy of roles within the enterprise while noting the incongruity in the charges preferred against this appellant and ES.
44The subjective circumstances of DS and ES are different, but not to any material degree. As we have noted, while they both relied upon the same mental health review by the same psychologist, his Honour rejected any submission that their conduct was impulsive or a result of any compromised capacity for reasoned judgment (see ES v R [2014] NSWCCA 268 at [18]). They were both members of extended families and had sound employment histories as far as the evidence revealed. The sentencing judge was faced with a difficult sentencing task. We are satisfied, however, that after taking into account the different maximum sentences under the DMT Act and the Code, and the fact that the supply count attracts a standard non-parole period of 15 years, the differential of 7 months between ES's undiscounted sentence and the sentence imposed on this appellant and a differential of 3 months in the sentence imposed on Lachlan Wilson is unjustified. It fails to reflect the different, and more senior, roles of those two co-offenders and their significantly different criminal culpability and stake in the success of the operation.
45Were we not persuaded that the ground of appeal alleging disparity was made out, we would not have intervened to re-sentence on the basis that the sentence imposed at first instance was manifestly excessive, in the sense of it being unreasonable or plainly unjust, after giving due weight to all relevant circumstances particular to this appellant's offending, including the maximum penalty of life imprisonment.